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P. J. ALWART. MEANS FOR CONVERHNG BASE BURNER STOVES mm) son COALHEATERS.

APPLICATION FILED DEC.5.19I8.

Patented I! une 3, 1919.

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PAUL J.. ALWART, OF CHICAGO, ILLINOIS.

MEANS FOR CONVERTING BASE-BURNER STQVES INTO SOFT-COAL HEATERS.

Specification of Letters Patent.

Application filed December 5, 1918. Serial No. 265,359.

To all whom it may concern:

Be it known that I, PAUL J. ALwAnT, a citizen of the United States, anda resldent of Chicago, Cook county, and State of Illiparticularly tomeans for converting hard.

coal base burner magazine stoves into soft coal heaters. 7

At the present time, hard coal is not read ily obtainable by the publicand in order to make up for the deficiency, soft coal is.

used as a substitute, but the use of soft coal in hard coal burningstoves is objectionable because of the soot, black smoke and odor whichattends the burning of soft coal in such stoves. The present inventionis designedto be applied to any of the well known hard coal base burnerstoves, thereby making it possible to burn soft coal in them without thehereinbefore mentioned objections. The invention consists in the severalnovel features hereinafter fully set forth and claimed.

The invention is clearly illustrated in the accompanying drawing, inwhich Figure 1 is a view partly in side elevation and partly in central,vertical section through a stove showing a simple embodiment of thepresent invention applied thereto; Fig. 2, is a fragmental plan of thetop of the stove with my device applied thereto and Fig. 3, is a detailvertical section taken on line 33 of Fig. 2.

Referring to said drawing, the reference character 5, designates a hardcoal base burner stove from which the magazine has been removed, whichmay comprise any of the well known stoves of this type, having the usualdraft passages controlled by a damper 6. A stove pipe 7, is connectedwith the stove, as usual, and may contain the damper 8, as is customary.

In converting a stove of this type into a soft coal burner, the magazineof the stove is removed therefrom, and the usual plate or lid is removedfrom the top 9, of the stove. In the opening in the top of the stove isplaced a plate 10, which is preferably cemented in place with stoveputty to prevent gas leakage. Said plate has an opening 11, for theescape of the products of combustion and a flange 11 is preferablyturned up at the margin of said opening 11. A stove pipe 12, extends upfrom said flange 11 and is connected to the main stove pipe 8, by a Tjoint 14. A damper 13, is placed in the pipe 12, to control the passagetherein.

An air vent 15, is provided in the plate 10, which is controlled by alid 17 preferably a flange 15 is formed around the margin of the airvent l5 and an air tube 16, is secured to said flange. Said air tube 16,extends down into the combustion chamber of the stove, and conducts airto the point of combustion.

In use, when starting the fire or when supplying additional fuelthereto, the lid 17 should be opened to admit an abundance of air to theplace of combustion, the damper 13 opened and the damper 8 closed. Airis supplied at the proper place, and a direct escape for the products ofcombustion is provided by the pipe 12. After the dense smoke hasdisappeared, the damper 13, may be closed and the damper 8 openedpermitting the products of'combustion to escape through the pipe 7 inthe usual maimer. The supply of air to the top of the coal may beregulated with the lid 17 In actual practice, .it has been found that amore perfect combustion of the fuel results from the use of a converterof this kind, that the transparent panes in the stove doors are notblackened as with the ordinary use of soft coal in hard coal base burnerstoves, and that a very eflicient heat is obtained with the use of softcoal in converted base burners. Moreover, the plates 10, may be readilycut to fit any size and shape of opening. in the top of the stove andthe device may be quickly and easily installed and at a small expense,thereby economizing in the use of hard coal and obtaining a maximum heatsupply and practically smokeless, from soft coal. The stove is adaptedto be converted from a soft coal burning stove into a base burner stoveby removing the plate 10 and parts connected thereto and replacing themagazine.

More or less variation of the exact details of construction is possiblewithout departing from the spirit of this invention; I desire,therefore, not to limit myself to the exact form of the constructionshown and described, but intend, in the following claims, to point outall of the invention disclosed herein.

Patented June 3, 191 9.

I claim as new and desire to secure by Letters Patent 1. In combinationwith a stove having an opening in its top adapted to receive a magazine,and adapted to be converted from a base burner stove into a soft coalstove, of converting means of the character described, comprising aplate adapted to be secured on the open top of the stove, and having anescape opening for the products of combustion and an air vent, and anair tube secured to said plate and extending down from said air vent.

2. In combination with a stove having an opening in its top adapted toreceive a magazine, and adapted to be converted from a base burner stoveinto a soft coal stove, of converting means of the character described,comprising a plate adapted to be secured on the open top of the stoveand having an escape opening for the products of combustion and an airvent, regulating means for said air vent, and an air tube secured tosaid plate and extending down from said air vent.

3. In combination with a stove having an opening in its top adapted toreceive a magazine, and adapted to be converted from a Copies of thispatent may be obtained for base burner stove into a soft coal stove, of

a converter of the character described, comprising a plate arranged tobe secured on the open top of the stove and formed with an escapeopening for the products of combustion and an air vent, a stove pipehaving a damper therein leading up from said escape opening and an airpipe leading down from said air vent.

4. A soft coal burning device, comprising a stove, having a dampercontrolled smoke passage at its rear, and an opening in its top adaptedto receive a magazine, said magazine being adapted to be removed toconvert the stove into a soft coal stove, a smoke pipe extending fromsaid smoke passage, a removable and replaceable plate covering saidopening in the top of the stove, and having an escape openin for theproducts of combustion and an air vent, a damper controlled stovepipeextending from said escape opening in the plate and communicat ing withsaid first mentioned Stovepipe, and an air tube extending down into thestove from said air vent.

PAUL J. ALVART.

five cents each, by addressing the Commissioner of Patents.

Washington, D. G.

